270
Participants
Start Date
June 25, 2025
Primary Completion Date
May 26, 2027
Study Completion Date
May 26, 2027
ABC suction sequence
Suction sampling should be conducted in the sequence of dry-suction, slow-pull and wet-suction.
ACB suction sequence
Suction sampling should be conducted in the sequence of dry-suction, wet-suction and slow-pull.
BAC suction sequence
Suction sampling should be conducted in the sequence of slow-pull, dry-suction and wet-suction.
BCA suction sequence
Suction sampling should be conducted in the sequence of slow-pull, wet-suction and dry-suction.
CAB suction sequence
Suction sampling should be conducted in the sequence of wet-suction, dry-suction and slow-pull.
CBA suction sequence
Suction sampling should be conducted in the sequence of wet-suction, slow-pull and dry-suction.
Changhai Hospital, Shanghai
Changhai Hospital
OTHER